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/*
* Copyright (c) 2008, Google Inc. All rights reserved.
* Copyright (C) 2009 Dirk Schulze <krit@webkit.org>
* Copyright (C) 2010 Torch Mobile (Beijing) Co. Ltd. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following disclaimer
* in the documentation and/or other materials provided with the
* distribution.
* * Neither the name of Google Inc. nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "third_party/blink/renderer/platform/graphics/image_data_buffer.h"
#include "base/compiler_specific.h"
#include "base/memory/ptr_util.h"
#include "third_party/blink/renderer/platform/image-encoders/image_encoder_utils.h"
#include "third_party/blink/renderer/platform/wtf/text/base64.h"
#include "third_party/skia/include/core/SkImage.h"
#include "third_party/skia/include/core/SkSurface.h"
#include "ui/gfx/skia_span_util.h"
namespace blink {
ImageDataBuffer::ImageDataBuffer(scoped_refptr<StaticBitmapImage> image) {
if (!image)
return;
PaintImage paint_image = image->PaintImageForCurrentFrame();
if (!paint_image || paint_image.IsPaintWorklet())
return;
SkImageInfo paint_image_info = paint_image.GetSkImageInfo();
if (paint_image_info.isEmpty())
return;
#if defined(MEMORY_SANITIZER)
// Test if software SKImage has an initialized pixmap.
SkPixmap pixmap;
if (!paint_image.IsTextureBacked() &&
paint_image.GetSwSkImage()->peekPixels(&pixmap)) {
MSAN_CHECK_MEM_IS_INITIALIZED(pixmap.addr(), pixmap.computeByteSize());
}
#endif
if (paint_image.IsTextureBacked() || paint_image.IsLazyGenerated() ||
paint_image_info.alphaType() != kUnpremul_SkAlphaType) {
// Unpremul is handled upfront, using readPixels, which will correctly clamp
// premul color values that would otherwise cause overflows in the skia
// encoder unpremul logic.
SkColorType colorType = paint_image.GetColorType();
if (colorType == kRGBA_8888_SkColorType ||
colorType == kBGRA_8888_SkColorType)
colorType = kN32_SkColorType; // Work around for bug with JPEG encoder
const SkImageInfo info =
SkImageInfo::Make(paint_image_info.width(), paint_image_info.height(),
paint_image_info.colorType(), kUnpremul_SkAlphaType,
paint_image_info.refColorSpace());
const size_t rowBytes = info.minRowBytes();
size_t size = info.computeByteSize(rowBytes);
if (SkImageInfo::ByteSizeOverflowed(size))
return;
sk_sp<SkData> data = SkData::MakeUninitialized(size);
pixmap_ = {info, data->writable_data(), info.minRowBytes()};
if (!paint_image.readPixels(info, pixmap_.writable_addr(), rowBytes, 0,
0)) {
pixmap_.reset();
return;
}
MSAN_CHECK_MEM_IS_INITIALIZED(pixmap_.addr(), pixmap_.computeByteSize());
retained_image_ = SkImages::RasterFromData(info, std::move(data), rowBytes);
} else {
retained_image_ = paint_image.GetSwSkImage();
if (!retained_image_->peekPixels(&pixmap_))
return;
MSAN_CHECK_MEM_IS_INITIALIZED(pixmap_.addr(), pixmap_.computeByteSize());
}
is_valid_ = true;
}
ImageDataBuffer::ImageDataBuffer(const SkPixmap& pixmap)
: pixmap_(pixmap),
is_valid_(pixmap_.addr() &&
!gfx::Size(pixmap.width(), pixmap.height()).IsEmpty()) {}
std::unique_ptr<ImageDataBuffer> ImageDataBuffer::Create(
scoped_refptr<StaticBitmapImage> image) {
std::unique_ptr<ImageDataBuffer> buffer =
base::WrapUnique(new ImageDataBuffer(image));
if (!buffer->IsValid())
return nullptr;
return buffer;
}
std::unique_ptr<ImageDataBuffer> ImageDataBuffer::Create(
const SkPixmap& pixmap) {
std::unique_ptr<ImageDataBuffer> buffer =
base::WrapUnique(new ImageDataBuffer(pixmap));
if (!buffer->IsValid())
return nullptr;
return buffer;
}
base::span<const uint8_t> ImageDataBuffer::PixelData() const {
DCHECK(is_valid_);
return gfx::SkPixmapToSpan(pixmap_);
}
bool ImageDataBuffer::EncodeImage(const ImageEncodingMimeType mime_type,
const double& quality,
Vector<unsigned char>* encoded_image) const {
return ImageEncoder::Encode(encoded_image, pixmap_, mime_type, quality);
}
String ImageDataBuffer::ToDataURL(const ImageEncodingMimeType mime_type,
const double& quality) const {
DCHECK(is_valid_);
Vector<unsigned char> result;
if (!ImageEncoder::Encode(&result, pixmap_, mime_type, quality)) {
return "data:,";
}
return "data:" + ImageEncoderUtils::MimeTypeName(mime_type) + ";base64," +
Base64Encode(result);
}
} // namespace blink
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